The whole definition of TV is changing.
True, but that doesn't change the fact that Star Trek
is a premium brand (now more than ever thanks to JJ Abrams). CBS would be foolish to undo all the brand building work Abrams is doing for them (for free!) by making some cheapo web series that's not going to make them much money anyway.
Better to just do nothing, and wait for a proposal to come along that will encompass traditional TV plus streaming (why just do the internet when you can do both?) Orci doing an animated series with the Abrams characters (voiced by cheaper actors) is still far and away the most likely scenario.
But first, we have to wait for confirmation that the next movie is a success (and it will be). Then CBS may have confidence to go ahead. Don't underestimate what a tough sell space opera is on TV.